Push-pull type on-off valve

Abstract

The utility model relates to a push-pull type on-off valve, which comprises a valve seat assembly, a valve rod assembly and a valve rod assembly, a containing cavity is formed in the valve seat in the height direction of the valve seat, a first channel is formed in the side, corresponding to the containing cavity, of the valve seat, and a second channel is formed in the other side, corresponding to the containing cavity, of the valve seat. One end of the first channel inwards communicates with the containing cavity, and one end of the second channel inwards communicates with the containing cavity. The valve rod assembly is connected with the valve seat assembly; the valve rod assembly comprises a push-pull air cylinder installed above the valve seat and a valve rod connected to the tail end of the push-pull air cylinder. The valve rod is inserted into the containing cavity in a sliding mode. The valve rod is provided with an annular recess in the circumferential direction of the valve rod, and the two opposite ends, corresponding to the annular recess, of the valve rod are sleeved with sealing rings respectively. The push-pull type on-off valve is simple in structure and convenient to use, the valve rod is inserted into the containing cavity in a sliding mode to control on-off of the first channel and the second channel, the multiple sealing rings are matched, the sealing performance is effectively improved, abrasion is effectively reduced, and the machining precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of on-off valves for glue dispensing machines, in particular to a push-pull on-off valve. Background Art

[0002] Glue dispenser is an automated machine that controls fluids and drips or applies fluids to the surface or inside of products. It is widely used in electronics, lighting, automobile and other industries. The glue supply on-off valve in the glue dispenser is a device that controls the supply of glue and is used to achieve on-off control and flow regulation of glue. The glue supply on-off valve is a key component of the glue dispenser, which directly affects the accuracy and efficiency of glue dispensing.

[0003] At present, most of the glue supply on-off valves on the market are rotary mechanical seal structures. In order to ensure the stability of the glue supply on-off valve under long-term use, it is necessary to have high wear resistance. This is usually achieved by using hard materials on components such as the valve body and valve core. However, these hard materials will cause certain wear and tiny gaps due to their own hardness, and it is often difficult to achieve tight sealing, affecting the processing accuracy. Utility Model Content

[0004] Based on this, the utility model provides a push-pull on-off valve with a simple structure and easy use. It uses a valve stem to slide into the interior of the accommodating cavity to control the on-off of the first channel and the second channel. It is matched with multiple sealing rings to effectively improve the sealing performance, effectively reduce wear, and ensure processing accuracy.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] A push-pull on-off valve, comprising:

[0007] A valve seat assembly, comprising a valve seat; the valve seat is provided with an accommodating cavity along its height direction, a first channel is provided on one side of the valve seat corresponding to the accommodating cavity, and a second channel is provided on the other side of the valve seat corresponding to the accommodating cavity; one end of the first channel is connected inwardly to the accommodating cavity, and one end of the second channel is connected inwardly to the accommodating cavity; and

[0008] A valve stem assembly connected to a valve seat assembly; the valve stem assembly comprises a push-pull cylinder installed above the valve seat, and a valve stem connected to the end of the push-pull cylinder; the valve stem is slidably inserted into the interior of the accommodating cavity; the diameter of the valve stem is equal to the inner diameter of the accommodating cavity; the valve stem is provided with an annular recess along its circumference, and sealing rings are respectively sleeved at opposite ends of the valve stem corresponding to the annular recess, and the sealing rings are used to tightly abut the inner wall of the accommodating cavity.

[0009] The push-pull on-off valve has a simple structure and is easy to use. It uses the valve stem to slide into the accommodating cavity to control the on-off of the first channel and the second channel. It is equipped with multiple sealing rings to effectively improve the sealing performance, effectively reduce wear, and ensure processing accuracy.

[0010] In one embodiment, the annular recess is located on an end of the valve stem away from the push-pull cylinder.

[0011] In one embodiment, the accommodating cavity is configured as a cylindrical cavity.

[0012] In one embodiment, there is a height difference between the first channel and the second channel; the height of the annular recess is greater than or equal to the height difference between the first channel and the second channel.

[0013] In one embodiment, the valve seat assembly also includes a first joint connected to one side of the valve seat and a second joint connected to the other side of the valve seat; the end of the first channel away from the accommodating cavity is connected to the first joint, and the end of the second channel away from the accommodating cavity is connected to the second joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a push-pull on-off valve according to one embodiment of the utility model;

[0015] Figure 2 for Figure 1 An exploded schematic diagram of a push-pull on-off valve is shown;

[0016] Figure 3 for Figure 2 An exploded schematic diagram of the push-pull on-off valve from another perspective shown;

[0017] Figure 4 for Figure 2 Schematic diagram of assembly of valve stem and sealing ring in push-pull on-off valve shown;

[0018] Figure 5 for Figure 1 A cross-sectional view of the push-pull on-off valve shown in a cut-off state;

[0019] Figure 6 for Figure 1 The push-pull on-off valve is shown in a cross-sectional view in a conducting state.

[0020] Notes on the attached drawings:

[0021] 10-valve seat assembly, 11-valve seat, 12-first joint, 13-second joint, 14-accommodating chamber, 15-first channel, 16-second channel;

[0022] 20-valve stem assembly, 21-push-pull cylinder, 22-valve stem, 220-annular depression, 23-sealing ring. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] See also Figures 1 to 6 , is a push-pull on-off valve according to an embodiment of the present invention, comprising a valve seat assembly 10 and a valve stem assembly 20 connected to the valve seat assembly 10 .

[0027] The valve seat assembly 10 includes a valve seat 11, a first joint 12 connected to one side of the valve seat 11, and a second joint 13 connected to the other side of the valve seat 11. The valve seat 11 is provided with an accommodating cavity 14 along its height direction, a first channel 15 is provided on one side of the valve seat 11 corresponding to the accommodating cavity 14, and a second channel 16 is provided on the other side of the valve seat 11 corresponding to the accommodating cavity 14.

[0028] Specifically, one end of the first channel 15 is connected inwardly to the accommodating cavity 14, and the other end of the first channel 15 is connected outwardly to the first joint 12. One end of the second channel 16 is connected inwardly to the accommodating cavity 14, and the other end of the second channel 16 is connected outwardly to the second joint 13. The accommodating cavity 14, the first channel 15, and the second channel 16 can be used to connect the first joint 12 and the second joint 13.

[0029] In this embodiment, the accommodating cavity 14 is provided in a cylindrical cavity, and there is a height difference between the first channel 15 and the second channel 16 .

[0030] The valve stem assembly 20 includes a push-pull cylinder 21 installed above the valve seat 11 and a valve stem 22 connected to the end of the push-pull cylinder 21; the valve stem 22 is slidably inserted into the interior of the accommodating cavity 14. The diameter of the valve stem 22 is equal to the inner diameter of the accommodating cavity 14.

[0031] Specifically, the valve stem 22 is provided with an annular recess 220 along its circumference, and the annular recess 220 is located at one end of the valve stem 22 away from the push-pull cylinder 21. The valve stem 22 is provided with sealing rings 23 at opposite ends corresponding to the annular recess 220, respectively, and the sealing ring 23 is used to closely abut against the inner wall of the accommodating cavity 14 to improve the sealing performance.

[0032] like Figure 5 As shown, the push-pull cylinder 21 pushes the valve stem 22 to fall, and at this time, the side walls of the valve stem 22 respectively seal the first channel 15 and the second channel 16, so that the valve seat 11 is in a cut-off state. Figure 6 As shown, the push-pull cylinder 21 pulls the valve stem 22 upward, and the annular recess 220 moves between the first channel 15 and the second channel 16. Since there is a gap between the annular recess 220 and the accommodating chamber 14, the gap can be used to connect the first channel 15 and the second channel 16, so that the valve seat 11 is in a conducting state. Compared with the rotary mechanical seal structure of the traditional on-off valve, the valve stem 22 of the utility model is slidably inserted into the accommodating chamber 14 to control the on-off of the first channel 15 and the second channel 16, and is matched with multiple sealing rings 23, which effectively improves the sealing performance, effectively reduces wear, and ensures processing accuracy.

[0033] In this embodiment, the height of the annular recess 220 is greater than or equal to the height difference between the first channel 15 and the second channel 16 .

[0034] The push-pull on-off valve has a simple structure and is easy to use. The valve stem 22 is slidably inserted into the accommodating cavity 14 to control the on-off of the first channel 15 and the second channel 16. It is matched with multiple sealing rings 23 to effectively improve the sealing performance, effectively reduce wear and ensure processing accuracy.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A push-pull on-off valve, characterized in that: include: A valve seat assembly, comprising a valve seat; the valve seat is provided with an accommodating cavity along its height direction, a first channel is provided on one side of the valve seat corresponding to the accommodating cavity, and a second channel is provided on the other side of the valve seat corresponding to the accommodating cavity; one end of the first channel is connected inwardly to the accommodating cavity, and one end of the second channel is connected inwardly to the accommodating cavity; and A valve stem assembly connected to a valve seat assembly; the valve stem assembly comprises a push-pull cylinder installed above the valve seat, and a valve stem connected to the end of the push-pull cylinder; the valve stem is slidably inserted into the interior of the accommodating cavity; the diameter of the valve stem is equal to the inner diameter of the accommodating cavity; the valve stem is provided with an annular recess along its circumference, and sealing rings are respectively sleeved at opposite ends of the valve stem corresponding to the annular recess, and the sealing rings are used to tightly abut the inner wall of the accommodating cavity.

2. The push-pull on-off valve according to claim 1, characterized in that: The annular depression is located on an end of the valve stem away from the push-pull cylinder.

3. The push-pull on-off valve according to claim 1, characterized in that: The accommodating cavity is arranged in a cylindrical cavity.

4. The push-pull on-off valve according to claim 1, characterized in that: There is a height difference between the first channel and the second channel; the height of the annular recess is greater than or equal to the height difference between the first channel and the second channel.

5. The push-pull on-off valve according to claim 1, characterized in that: The valve seat assembly also includes a first joint connected to one side of the valve seat and a second joint connected to the other side of the valve seat; the end of the first channel away from the accommodating cavity is connected to the first joint, and the end of the second channel away from the accommodating cavity is connected to the second joint.

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